Discrete-control correction A technique for the synchronization of digital communication networks
K.R. Krishnan, R. Mukundan, D. A. RERREAULT, Robert F. Cotellessa · International Journal of Systems Science · 1976
Discrete-control correction is a method of synchronizing the clocks of a digital communication network by means of periodic corrections to their frequencies, the correction to each clock being derived from the change in the buffer level at that node. This paper presents a comprehensive treatment of this method and extends the results of earlier papers to more general situations. It is shown that there is a set of conditions, one for each node, which is sufficient to establish network synchronism. Explicit formulae are derived for the frequency of synchronism and the steady-state buffer levels. It is shown also that the master—slave scheme of synchronization, in which the clocks of the network are synchronized to a designated master clock, is obtained as the special case of discrete-control correction in which corrections are made to all the clocks except the master clock. It is pointed out that in the event of disruption of a part of the network, the surviving part or parts of the network are assured of regaining synchronism.